Fbedebick tudor laws



PATENTED SEPT. 20, 1904. F. T. LAWS, W. G. SMITH & G. J. GIBBS.

' METAL PRESS.

- operated by a cam-sleeve.

UNITED STATES Patented September 20, 1904.

PATENT OFFICE.

FREDERICK TUDOR LAWS, OF FAILSWORTH, WILLIAM CHURCH SMITH, OF MANCHESTER, AND GEORGE JAMES GIBBS, OF YORK, ENGLAND.

PRESS.

SPECIFICATION forming part of Letters Patent No. 770,375, dated September 20, 1904.

Application filed April 2, 1901.

To all whmn it may concern:

Be it known that we, FREDERICK TUDOR LAWs, engineer, residing at May Villa, 15 Timson street, Failsworth; WILLIAM CHURoH SMITH, engineer, residing at New Moston, Manchester, in the county of Lancaster, and GEORGE JAMns GIBBs, engineer, residing at 76 Heslington road, York, in the county of York, England, subjects of the King of Great Britain and Ireland, have invented certain Improvements in Metal-Presses, of which the following is a specification.

This invention relates to improvements in or in connection with means for producing drills, drill-holders, boring and cutter bars, mandrels, machine-sockets, couplings, and the like, the object being to provide improved means whereby the drills, tool-bars, or the like may be firmly held in their sockets or holders and wherebyalso shafts may be securely held in couplings and bosses or tools be slidably mounted on shafts, the invention comprising the construction of novel means adapted to the ends in view.

Prior to the date of our invention, and more especially in connection with what are known as twist-drills, it has been a common practice to provide the latter with a tapering shank terminating in a flattened tang atthe small end and adapted to fit into a correspondinglytapered drill stock or socket, provided also with an elongated slot corresponding to the tang referred to. It has been found in heavy work that the flattened tangs of the drills are very often twisted off by the torsional strain on them, and in consequence the sockets turn with the spindle of the machine, but do not drive the drills or bars. cent years several devices have been adopted whereby the drill might be held at some portion in the length of its shank in addition to being held by its flattened tang, as before referred to. In one case the drill is provided with a continuous flat surface engaging with a corresponding surface in the drill-stock. In a second device a groove is cut longitudinally of the shank and is engaged by a small feather In a third invention the shank of the drill has also agroove To overcome this objection, in re- Serial No. 54,058- (No model.)

which is engaged by a spring controlled feather, while in another case one or both of the ordinary cutting-grooves in the drill is or are continued forward along the full length of the shank, and a corresponding piece or pieces is or are let into the socket for driving the drill.

The foregoing particulars give a general idea of the state of the art at the present time; and our invention consists in an improvement upon all the means previously described and consists, essentially, in means for providing the drill-shank with a continuous groove and the drill-socket with a continuous feather capable of engaging with said groove, the said feather being pressed out of. the material of which the drill-socket is made.

Our invention will be fully described with reference to the accompanying drawings, in which Figure l is a longitudinal section of a drill- .socket with a drill fitted therein; Fig. 2, an end elevation of same with the drill in cross-section; Fig. 3, a partial sectional elevation of the means adopted for forming the feather in the drill-socket; and Fig. 4:, a side elevation, partly in section, of the means shown in 'Fig. 8.

In carrying out our invention and referring to Figs. 1 and 2, a is the drill, provided along its shank with a longitudinal groove 6, preferably, but not necessarily, with parallel sides and of a square, V-shaped, semicircular, or similar section. 0 is the drill-socket, provided generally with a tapering hole cl, corresponding to the taper of the drill a and provided at one side with a feather e, corresponding to the shape of the groove formed in the drill. The feather e is adapted to fit closely to the sides of the groove 6, but it may be clear of the bottom of said groove, as indicated in Fig. 2. The drill-socket may be further provided with a circular hole f at the top end in place of the usual rectangular hole at present used, said hole allowing of the passage therethrough of a tool to enable the drill to be disengaged from its socket. The feather c, it should be observed, is formed out of the material composing the socket c and is formed therein by the means shown in Figs. 3 and 4. In these similar letters indicate corresponding parts to those in Figs. 1 and 2.

g is a suitable framework adapted to carry a press-tool h, which may be operated by any suitable means, so as to have a risingandfalling movement. The press-tool 7L, moreover,

. is held in position laterally while in operation by means of a slot 4 formed in a bearingblock which is drilled out to receive the drill-socket c. The bearing-block may be supported in any convenient manner in the frame 9.

k is a mandrel-tool having a shank corresponding to that of the drill-shank which is to be used in connection with the socket, to

be provided with a feather, and is forced into and held in the drill-socket 0 by any suitable means while the feather is being made and is withdrawn therefrom on completion also by the said means. The tool I: has formed in it a longitudinal groove Z, also corresponding in size and shape to that in the drill-shank.

From the foregoing it will be seen that on the press-tool it descending it will force inward the metal opposite to it into the groove Z, so as to obtain the feather e, as indicated in Fig. 2.

The means described are exceedingly simple in construction, and it will be obvious that the feather 0 being formed out of the material of the socket, holder, coupling, or the like will never become loose, and consequently it forms a strong driving medium free from the disadvantages inherent in the devices referred to in the preamble to this specification. Further, the means are much simpler in construction and may be made much more cheaply.

What we claim as our invention, and desire to protect by Letters Patent, is

Means for producing keys, splines and feathers on tubular members, comprising a mandrel fitted in'a tubular member and having a groove; a bearing-block having a hole to receive the mandrel and tube and a guideway with which the groove of the mandrel alines; and a movable press-tool working in the guideway, coacting with the grooved mandrel.

In witness whereof we have hereunto set our hands in the presence of two witnesses.

FREDK. TUDOR LAWS. WILLIAM CHURCH SMITH. GEORGE JAMES GIBBS.

Witnesses:

WILLIAM H. TAYLOR, J AS. STEWART BROADFOOT. 

